/* Sketch for Tutorial 14
Author: Maximilian Hentsch
Sketch zu Arduino Tutorial 14 - Displaymenü
https://www.youtube.com/watch?v=DuAG98P9Seo
*/

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

int upButton = 2;
int downButton = 4;
int selectButton = 5;
int menu = 1;

void setup() {
  lcd.init();
  lcd.backlight();
  pinMode(upButton, INPUT_PULLUP);
  pinMode(downButton, INPUT_PULLUP);
  pinMode(selectButton, INPUT_PULLUP);
  updateMenu();
}

void loop() {
  if (!digitalRead(downButton)){
    menu++;
    updateMenu();
    delay(100);
    while (!digitalRead(downButton));
  }
  if (!digitalRead(upButton)){
    menu--;
    updateMenu();
    delay(100);
    while(!digitalRead(upButton));
  }
  if (!digitalRead(selectButton)){
    executeAction();
    updateMenu();
    delay(100);
    while (!digitalRead(selectButton));
  }
}

void updateMenu() {
  switch (menu) {
    case 0:
      menu = 1;
      break;
    case 1:
      lcd.clear();
      lcd.print(">MenuItem1");
      lcd.setCursor(0, 1);
      lcd.print(" MenuItem2");
      break;
    case 2:
      lcd.clear();
      lcd.print(" MenuItem1");
      lcd.setCursor(0, 1);
      lcd.print(">MenuItem2");
      break;
    case 3:
      lcd.clear();
      lcd.print(">MenuItem3");
      lcd.setCursor(0, 1);
      lcd.print(" MenuItem4");
      break;
    case 4:
      lcd.clear();
      lcd.print(" MenuItem3");
      lcd.setCursor(0, 1);
      lcd.print(">MenuItem4");
      break;
      //-----------------NEU---------------
     case 5:
      lcd.clear();
      lcd.print(">MenuItem5");
      lcd.setCursor(0, 1);
      lcd.print(" MenuItem6");
      break;
    case 6:
      lcd.clear();
      lcd.print(" MenuItem5");
      lcd.setCursor(0, 1);
      lcd.print(">MenuItem6");
      break;
     //-----------------NEU---------------
    case 7:
      menu = 6;
      break;
  }
}

void executeAction() {
  switch (menu) {
    case 1:
      action1();
      break;
    case 2:
      action2();
      break;
    case 3:
      action3();
      break;
    case 4:
      action4();
      break;
      //-----------------NEU---------------
      case 5:
      action5();
      break;
    case 6:
      action6();
      break;
     //-----------------NEU--------------- 
  }
}

void action1() {
  lcd.clear();
  lcd.print(">Executing #1");
  //delay(1500);
}
void action2() {
  lcd.clear();
  lcd.print(">Executing #2");
  delay(1500);
}
void action3() {
  lcd.clear();
  lcd.print(">Executing #3");
  delay(1500);
}
void action4() {
  lcd.clear();
  lcd.print(">Executing #4");
  delay(1500);
}
//-----------------NEU---------------
void action5() {
  lcd.clear();
  lcd.print(">Executing #5");
  delay(1500);
}
void action6() {
  lcd.clear();
  lcd.print(">Executing #6");
  delay(1500);
}
//-----------------NEU---------------